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// Copyright 2013 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package remote
import (
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"context"
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"fmt"
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"io/ioutil"
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"math"
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"os"
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"reflect"
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"sort"
"strconv"
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"sync"
"sync/atomic"
"testing"
"time"
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"github.com/go-kit/kit/log"
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"github.com/gogo/protobuf/proto"
"github.com/golang/snappy"
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client_testutil "github.com/prometheus/client_golang/prometheus/testutil"
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"github.com/prometheus/common/model"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/pkg/labels"
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"github.com/prometheus/prometheus/prompb"
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tsdbLabels "github.com/prometheus/prometheus/tsdb/labels"
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"github.com/prometheus/prometheus/tsdb/record"
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"github.com/prometheus/prometheus/util/testutil"
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)
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const defaultFlushDeadline = 1 * time . Minute
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func TestSampleDelivery ( t * testing . T ) {
// Let's create an even number of send batches so we don't run into the
// batch timeout case.
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n := config . DefaultQueueConfig . MaxSamplesPerSend * 2
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samples , series := createTimeseries ( n )
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c := NewTestStorageClient ( )
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c . expectSamples ( samples [ : len ( samples ) / 2 ] , series )
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cfg := config . DefaultQueueConfig
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cfg . BatchSendDeadline = model . Duration ( 100 * time . Millisecond )
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cfg . MaxShards = 1
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dir , err := ioutil . TempDir ( "" , "TestSampleDeliver" )
testutil . Ok ( t , err )
defer os . RemoveAll ( dir )
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m := NewQueueManager ( nil , nil , dir , newEWMARate ( ewmaWeight , shardUpdateDuration ) , cfg , nil , nil , c , defaultFlushDeadline )
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m . StoreSeries ( series , 0 )
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// These should be received by the client.
m . Start ( )
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m . Append ( samples [ : len ( samples ) / 2 ] )
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defer m . Stop ( )
c . waitForExpectedSamples ( t )
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m . Append ( samples [ len ( samples ) / 2 : ] )
c . expectSamples ( samples [ len ( samples ) / 2 : ] , series )
c . waitForExpectedSamples ( t )
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}
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func TestSampleDeliveryTimeout ( t * testing . T ) {
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// Let's send one less sample than batch size, and wait the timeout duration
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n := 9
samples , series := createTimeseries ( n )
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c := NewTestStorageClient ( )
cfg := config . DefaultQueueConfig
cfg . MaxShards = 1
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cfg . BatchSendDeadline = model . Duration ( 100 * time . Millisecond )
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dir , err := ioutil . TempDir ( "" , "TestSampleDeliveryTimeout" )
testutil . Ok ( t , err )
defer os . RemoveAll ( dir )
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m := NewQueueManager ( nil , nil , dir , newEWMARate ( ewmaWeight , shardUpdateDuration ) , cfg , nil , nil , c , defaultFlushDeadline )
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m . StoreSeries ( series , 0 )
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m . Start ( )
defer m . Stop ( )
// Send the samples twice, waiting for the samples in the meantime.
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c . expectSamples ( samples , series )
m . Append ( samples )
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c . waitForExpectedSamples ( t )
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c . expectSamples ( samples , series )
m . Append ( samples )
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c . waitForExpectedSamples ( t )
}
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func TestSampleDeliveryOrder ( t * testing . T ) {
ts := 10
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n := config . DefaultQueueConfig . MaxSamplesPerSend * ts
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samples := make ( [ ] record . RefSample , 0 , n )
series := make ( [ ] record . RefSeries , 0 , n )
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for i := 0 ; i < n ; i ++ {
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name := fmt . Sprintf ( "test_metric_%d" , i % ts )
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samples = append ( samples , record . RefSample {
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Ref : uint64 ( i ) ,
T : int64 ( i ) ,
V : float64 ( i ) ,
} )
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series = append ( series , record . RefSeries {
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Ref : uint64 ( i ) ,
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Labels : tsdbLabels . Labels { tsdbLabels . Label { Name : "__name__" , Value : name } } ,
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} )
}
c := NewTestStorageClient ( )
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c . expectSamples ( samples , series )
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dir , err := ioutil . TempDir ( "" , "TestSampleDeliveryOrder" )
testutil . Ok ( t , err )
defer os . RemoveAll ( dir )
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m := NewQueueManager ( nil , nil , dir , newEWMARate ( ewmaWeight , shardUpdateDuration ) , config . DefaultQueueConfig , nil , nil , c , defaultFlushDeadline )
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m . StoreSeries ( series , 0 )
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m . Start ( )
defer m . Stop ( )
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// These should be received by the client.
m . Append ( samples )
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c . waitForExpectedSamples ( t )
}
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func TestShutdown ( t * testing . T ) {
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deadline := 1 * time . Second
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c := NewTestBlockedStorageClient ( )
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dir , err := ioutil . TempDir ( "" , "TestShutdown" )
testutil . Ok ( t , err )
defer os . RemoveAll ( dir )
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m := NewQueueManager ( nil , nil , dir , newEWMARate ( ewmaWeight , shardUpdateDuration ) , config . DefaultQueueConfig , nil , nil , c , deadline )
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samples , series := createTimeseries ( 2 * config . DefaultQueueConfig . MaxSamplesPerSend )
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m . StoreSeries ( series , 0 )
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m . Start ( )
// Append blocks to guarantee delivery, so we do it in the background.
go func ( ) {
m . Append ( samples )
} ( )
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time . Sleep ( 100 * time . Millisecond )
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// Test to ensure that Stop doesn't block.
start := time . Now ( )
m . Stop ( )
// The samples will never be delivered, so duration should
// be at least equal to deadline, otherwise the flush deadline
// was not respected.
duration := time . Since ( start )
if duration > time . Duration ( deadline + ( deadline / 10 ) ) {
t . Errorf ( "Took too long to shutdown: %s > %s" , duration , deadline )
}
if duration < time . Duration ( deadline ) {
t . Errorf ( "Shutdown occurred before flush deadline: %s < %s" , duration , deadline )
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}
}
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func TestSeriesReset ( t * testing . T ) {
c := NewTestBlockedStorageClient ( )
deadline := 5 * time . Second
numSegments := 4
numSeries := 25
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dir , err := ioutil . TempDir ( "" , "TestSeriesReset" )
testutil . Ok ( t , err )
defer os . RemoveAll ( dir )
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m := NewQueueManager ( nil , nil , dir , newEWMARate ( ewmaWeight , shardUpdateDuration ) , config . DefaultQueueConfig , nil , nil , c , deadline )
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for i := 0 ; i < numSegments ; i ++ {
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series := [ ] record . RefSeries { }
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for j := 0 ; j < numSeries ; j ++ {
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series = append ( series , record . RefSeries { Ref : uint64 ( ( i * 100 ) + j ) , Labels : tsdbLabels . Labels { { Name : "a" , Value : "a" } } } )
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}
m . StoreSeries ( series , i )
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}
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testutil . Equals ( t , numSegments * numSeries , len ( m . seriesLabels ) )
m . SeriesReset ( 2 )
testutil . Equals ( t , numSegments * numSeries / 2 , len ( m . seriesLabels ) )
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}
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func TestReshard ( t * testing . T ) {
size := 10 // Make bigger to find more races.
n := config . DefaultQueueConfig . Capacity * size
samples , series := createTimeseries ( n )
c := NewTestStorageClient ( )
c . expectSamples ( samples , series )
cfg := config . DefaultQueueConfig
cfg . MaxShards = 1
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dir , err := ioutil . TempDir ( "" , "TestReshard" )
testutil . Ok ( t , err )
defer os . RemoveAll ( dir )
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m := NewQueueManager ( nil , nil , dir , newEWMARate ( ewmaWeight , shardUpdateDuration ) , cfg , nil , nil , c , defaultFlushDeadline )
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m . StoreSeries ( series , 0 )
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m . Start ( )
defer m . Stop ( )
go func ( ) {
for i := 0 ; i < len ( samples ) ; i += config . DefaultQueueConfig . Capacity {
sent := m . Append ( samples [ i : i + config . DefaultQueueConfig . Capacity ] )
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testutil . Assert ( t , sent , "samples not sent" )
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time . Sleep ( 100 * time . Millisecond )
}
} ( )
for i := 1 ; i < len ( samples ) / config . DefaultQueueConfig . Capacity ; i ++ {
m . shards . stop ( )
m . shards . start ( i )
time . Sleep ( 100 * time . Millisecond )
}
c . waitForExpectedSamples ( t )
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}
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func TestReshardRaceWithStop ( t * testing . T ) {
c := NewTestStorageClient ( )
var m * QueueManager
h := sync . Mutex { }
h . Lock ( )
go func ( ) {
for {
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m = NewQueueManager ( nil , nil , "" , newEWMARate ( ewmaWeight , shardUpdateDuration ) , config . DefaultQueueConfig , nil , nil , c , defaultFlushDeadline )
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m . Start ( )
h . Unlock ( )
h . Lock ( )
m . Stop ( )
}
} ( )
for i := 1 ; i < 100 ; i ++ {
h . Lock ( )
m . reshardChan <- i
h . Unlock ( )
}
}
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func TestReleaseNoninternedString ( t * testing . T ) {
c := NewTestStorageClient ( )
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m := NewQueueManager ( nil , nil , "" , newEWMARate ( ewmaWeight , shardUpdateDuration ) , config . DefaultQueueConfig , nil , nil , c , defaultFlushDeadline )
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m . Start ( )
for i := 1 ; i < 1000 ; i ++ {
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m . StoreSeries ( [ ] record . RefSeries {
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{
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Ref : uint64 ( i ) ,
Labels : tsdbLabels . Labels {
tsdbLabels . Label {
Name : "asdf" ,
Value : fmt . Sprintf ( "%d" , i ) ,
} ,
} ,
} ,
} , 0 )
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m . SeriesReset ( 1 )
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}
metric := client_testutil . ToFloat64 ( noReferenceReleases )
testutil . Assert ( t , metric == 0 , "expected there to be no calls to release for strings that were not already interned: %d" , int ( metric ) )
}
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func TestCalculateDesiredsShards ( t * testing . T ) {
type testcase struct {
startingShards int
samplesIn , samplesOut int64
reshard bool
}
cases := [ ] testcase {
{
// Test that ensures that if we haven't successfully sent a
// sample recently the queue will not reshard.
startingShards : 10 ,
reshard : false ,
samplesIn : 1000 ,
samplesOut : 10 ,
} ,
{
startingShards : 5 ,
reshard : true ,
samplesIn : 1000 ,
samplesOut : 10 ,
} ,
}
for _ , c := range cases {
client := NewTestStorageClient ( )
m := NewQueueManager ( nil , nil , "" , newEWMARate ( ewmaWeight , shardUpdateDuration ) , config . DefaultQueueConfig , nil , nil , client , defaultFlushDeadline )
m . numShards = c . startingShards
m . samplesIn . incr ( c . samplesIn )
m . samplesOut . incr ( c . samplesOut )
m . lastSendTimestamp = time . Now ( ) . Unix ( )
// Resharding shouldn't take place if the last successful send was > batch send deadline*2 seconds ago.
if ! c . reshard {
m . lastSendTimestamp = m . lastSendTimestamp - int64 ( 3 * time . Duration ( config . DefaultQueueConfig . BatchSendDeadline ) / time . Second )
}
m . Start ( )
desiredShards := m . calculateDesiredShards ( )
m . Stop ( )
if ! c . reshard {
testutil . Assert ( t , desiredShards == m . numShards , "expected calculateDesiredShards to not want to reshard, wants to change from %d to %d shards" , m . numShards , desiredShards )
} else {
testutil . Assert ( t , desiredShards != m . numShards , "expected calculateDesiredShards to want to reshard, wants to change from %d to %d shards" , m . numShards , desiredShards )
}
}
}
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func createTimeseries ( n int ) ( [ ] record . RefSample , [ ] record . RefSeries ) {
samples := make ( [ ] record . RefSample , 0 , n )
series := make ( [ ] record . RefSeries , 0 , n )
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for i := 0 ; i < n ; i ++ {
name := fmt . Sprintf ( "test_metric_%d" , i )
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samples = append ( samples , record . RefSample {
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Ref : uint64 ( i ) ,
T : int64 ( i ) ,
V : float64 ( i ) ,
} )
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series = append ( series , record . RefSeries {
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Ref : uint64 ( i ) ,
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Labels : tsdbLabels . Labels { { Name : "__name__" , Value : name } } ,
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} )
}
return samples , series
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}
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func getSeriesNameFromRef ( r record . RefSeries ) string {
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for _ , l := range r . Labels {
if l . Name == "__name__" {
return l . Value
}
}
return ""
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}
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type TestStorageClient struct {
receivedSamples map [ string ] [ ] prompb . Sample
expectedSamples map [ string ] [ ] prompb . Sample
wg sync . WaitGroup
mtx sync . Mutex
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buf [ ] byte
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}
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func NewTestStorageClient ( ) * TestStorageClient {
return & TestStorageClient {
receivedSamples : map [ string ] [ ] prompb . Sample { } ,
expectedSamples : map [ string ] [ ] prompb . Sample { } ,
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}
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}
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func ( c * TestStorageClient ) expectSamples ( ss [ ] record . RefSample , series [ ] record . RefSeries ) {
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c . mtx . Lock ( )
defer c . mtx . Unlock ( )
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c . expectedSamples = map [ string ] [ ] prompb . Sample { }
c . receivedSamples = map [ string ] [ ] prompb . Sample { }
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for _ , s := range ss {
seriesName := getSeriesNameFromRef ( series [ s . Ref ] )
c . expectedSamples [ seriesName ] = append ( c . expectedSamples [ seriesName ] , prompb . Sample {
Timestamp : s . T ,
Value : s . V ,
} )
}
c . wg . Add ( len ( ss ) )
}
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func ( c * TestStorageClient ) waitForExpectedSamples ( tb testing . TB ) {
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c . wg . Wait ( )
c . mtx . Lock ( )
defer c . mtx . Unlock ( )
for ts , expectedSamples := range c . expectedSamples {
if ! reflect . DeepEqual ( expectedSamples , c . receivedSamples [ ts ] ) {
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tb . Fatalf ( "%s: Expected %v, got %v" , ts , expectedSamples , c . receivedSamples [ ts ] )
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}
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}
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}
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func ( c * TestStorageClient ) expectSampleCount ( ss [ ] record . RefSample ) {
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c . mtx . Lock ( )
defer c . mtx . Unlock ( )
c . wg . Add ( len ( ss ) )
}
func ( c * TestStorageClient ) waitForExpectedSampleCount ( ) {
c . wg . Wait ( )
}
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func ( c * TestStorageClient ) Store ( _ context . Context , req [ ] byte ) error {
c . mtx . Lock ( )
defer c . mtx . Unlock ( )
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// nil buffers are ok for snappy, ignore cast error.
if c . buf != nil {
c . buf = c . buf [ : cap ( c . buf ) ]
}
reqBuf , err := snappy . Decode ( c . buf , req )
c . buf = reqBuf
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if err != nil {
return err
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}
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var reqProto prompb . WriteRequest
if err := proto . Unmarshal ( reqBuf , & reqProto ) ; err != nil {
return err
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}
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count := 0
for _ , ts := range reqProto . Timeseries {
var seriesName string
labels := labelProtosToLabels ( ts . Labels )
for _ , label := range labels {
if label . Name == "__name__" {
seriesName = label . Value
}
}
for _ , sample := range ts . Samples {
count ++
c . receivedSamples [ seriesName ] = append ( c . receivedSamples [ seriesName ] , sample )
}
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}
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c . wg . Add ( - count )
return nil
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}
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func ( c * TestStorageClient ) Name ( ) string {
return "teststorageclient"
}
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// TestBlockingStorageClient is a queue_manager StorageClient which will block
// on any calls to Store(), until the request's Context is cancelled, at which
// point the `numCalls` property will contain a count of how many times Store()
// was called.
type TestBlockingStorageClient struct {
numCalls uint64
}
func NewTestBlockedStorageClient ( ) * TestBlockingStorageClient {
return & TestBlockingStorageClient { }
}
func ( c * TestBlockingStorageClient ) Store ( ctx context . Context , _ [ ] byte ) error {
atomic . AddUint64 ( & c . numCalls , 1 )
<- ctx . Done ( )
return nil
}
func ( c * TestBlockingStorageClient ) NumCalls ( ) uint64 {
return atomic . LoadUint64 ( & c . numCalls )
}
func ( c * TestBlockingStorageClient ) Name ( ) string {
return "testblockingstorageclient"
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}
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func BenchmarkSampleDelivery ( b * testing . B ) {
// Let's create an even number of send batches so we don't run into the
// batch timeout case.
n := config . DefaultQueueConfig . MaxSamplesPerSend * 10
samples , series := createTimeseries ( n )
c := NewTestStorageClient ( )
cfg := config . DefaultQueueConfig
cfg . BatchSendDeadline = model . Duration ( 100 * time . Millisecond )
cfg . MaxShards = 1
dir , err := ioutil . TempDir ( "" , "BenchmarkSampleDelivery" )
testutil . Ok ( b , err )
defer os . RemoveAll ( dir )
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m := NewQueueManager ( nil , nil , dir , newEWMARate ( ewmaWeight , shardUpdateDuration ) , cfg , nil , nil , c , defaultFlushDeadline )
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m . StoreSeries ( series , 0 )
// These should be received by the client.
m . Start ( )
defer m . Stop ( )
b . ResetTimer ( )
for i := 0 ; i < b . N ; i ++ {
c . expectSampleCount ( samples )
m . Append ( samples )
c . waitForExpectedSampleCount ( )
}
// Do not include shutdown
b . StopTimer ( )
}
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func BenchmarkStartup ( b * testing . B ) {
dir := os . Getenv ( "WALDIR" )
if dir == "" {
return
}
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// Find the second largest segment; we will replay up to this.
// (Second largest as WALWatcher will start tailing the largest).
dirents , err := ioutil . ReadDir ( dir )
testutil . Ok ( b , err )
var segments [ ] int
for _ , dirent := range dirents {
if i , err := strconv . Atoi ( dirent . Name ( ) ) ; err != nil {
segments = append ( segments , i )
}
}
sort . Ints ( segments )
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logger := log . NewLogfmtLogger ( log . NewSyncWriter ( os . Stdout ) )
logger = log . With ( logger , "caller" , log . DefaultCaller )
for n := 0 ; n < b . N ; n ++ {
c := NewTestBlockedStorageClient ( )
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m := NewQueueManager ( nil , logger , dir ,
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newEWMARate ( ewmaWeight , shardUpdateDuration ) ,
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config . DefaultQueueConfig , nil , nil , c , 1 * time . Minute )
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m . watcher . StartTime = math . MaxInt64
m . watcher . MaxSegment = segments [ len ( segments ) - 2 ]
err := m . watcher . Run ( )
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testutil . Ok ( b , err )
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}
}
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func TestProcessExternalLabels ( t * testing . T ) {
for _ , tc := range [ ] struct {
labels tsdbLabels . Labels
externalLabels labels . Labels
expected labels . Labels
} {
// Test adding labels at the end.
{
labels : tsdbLabels . Labels { { Name : "a" , Value : "b" } } ,
externalLabels : labels . Labels { { Name : "c" , Value : "d" } } ,
expected : labels . Labels { { Name : "a" , Value : "b" } , { Name : "c" , Value : "d" } } ,
} ,
// Test adding labels at the beginning.
{
labels : tsdbLabels . Labels { { Name : "c" , Value : "d" } } ,
externalLabels : labels . Labels { { Name : "a" , Value : "b" } } ,
expected : labels . Labels { { Name : "a" , Value : "b" } , { Name : "c" , Value : "d" } } ,
} ,
// Test we don't override existing labels.
{
labels : tsdbLabels . Labels { { Name : "a" , Value : "b" } } ,
externalLabels : labels . Labels { { Name : "a" , Value : "c" } } ,
expected : labels . Labels { { Name : "a" , Value : "b" } } ,
} ,
} {
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testutil . Equals ( t , tc . expected , processExternalLabels ( tc . labels , tc . externalLabels ) )
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}
}